C r clarke 25 plastic injection moulding machine c r clarke 25 the c r clarke type 25 injection moulding machine produces dense production quality mouldings up to 25g it is also ideal for demonstrating the principles of injection moulding techniquesa female mould in two or more pieces is manufactured from heat proof material granulated plastic is heated to its molten state then pressed injected into the mould after cooling the mould is taken apart and the plastic component is remov